设数列{an}满足a1+3a2+3^2a3+3^3a4+······+3^n-1×an=3分之n,n属于N* 【1】求数

设数列{an}满足a1+3a2+3^2a3+3^3a4+······+3^n-1×an=3分之n,n属于N* 【1】求数 设数列｛an｝满足a1+2a2+3a3+.+nan=n(n+1)(n+2) 设数列{an}满足a1+3 a2+3^2 a3+……+3^n-1 an=n/3,a属于N* 求数列{an}的通项 设数列｛an｝满足a1+3a2+3平方a3+...+3n-1an=n/3,n属于N*.求数列｛an｝的通项公式? 设数列【an】满足a1=1,3（a1+a2+a3+······+an）=（n+2）an,求通项an 设数列{An}满足A1+3A2+3^2*A3+...+3^(n-1)*An=n/3,a属于正整数. 设数列{an}满足a1+3*a2+3^2*a3+......+3^(n-1)*an=3/n,n属于正整数。 (1)求数列 设数列｛an}满足a1+3a2+3^2a3+······+3^(n-1)an=n/3,a∈N*.（1）求数列{an}的通 设数列{an}的前n项和为Sn,a1=1,且3a(n+1)=Sn,(1)求a2,a3,a4及an (2)求a2+a4+· 设数列an满足a1+3a2+3^2a3+.+3^n-1an=n/3,n∈N*,求数列an的通项公式 设数列{an}满足a1+3a2+3^2a3+.3^n-1×an=n/3,a∈N+. 设数列{an}满足a1+3a2+3²a3+...+3^(n-1)an=n/3,n∈N+*.（1）求数列{an}